An Assessment of Greenland Halibut (Reinhardtius hippoglossoides) in
Recent assessments of this stock have used extended survivors analysis (XSA) to estimate population numbers and fishing mortality. In 2008, the Canadian survey of Divisions 2J3K was not completed and investigations into the comparability of the 2008 data to those of previous years were conducted. Du...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9824 http://archive.nafo.int/open/sc/2009/scr09-039.pdf |
| Summary: | Recent assessments of this stock have used extended survivors analysis (XSA) to estimate population numbers and fishing mortality. In 2008, the Canadian survey of Divisions 2J3K was not completed and investigations into the comparability of the 2008 data to those of previous years were conducted. Due to the importance of the areas missed during the 2008 survey, it was determined that it would be inappropriate to use the 2008 Canadian survey results for Divs. 2J3K in any XSA analyses. Given the survey-specific weighting used to estimate survivors, and considering the unavailability of the Canadian fall survey data, it was considered inappropriate to update the XSA analysis. Projections from the previous assessment are provided which replace assumed 2008 catches applied in the previous assessment with the actual 2008 catch-at-age. Results indicate that if catches over 2009-2012 are constant at 16 000 tons, the projected exploitable biomass remains stable with minimal recovery. Exploitable biomass is projected to rapidly increase if fishing mortality is reduced to the F0.1 level, but remains well below the Rebuilding Plan target |
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